A WebmasterWorld thread has several AdSense publishers complaining that the Google AdSense Competitive Ad Filters does not seem to be working 100% of the time.
I've been noticing that several competitive Urls that we've had blocked for some time are starting to show back up on the site. I've dumped the list for a couple of days, then put them back in, next day there back on the site! Is anyone else seeing this?
The folks in the thread understand that it "may take up to 4 hours for ads linking to these URLs to be filtered from your pages." But the ads sometimes still show. Are they typing in the URLs wrong? Who knows...
Forum discussion at WebmasterWorld.